I guess what I mean is that God explicity "reserves the right" to get involved at any point He chooses. And often--not always--it would look like an arbitrary change in the rules, because we don't see His hidden hand at work; other times, it would *really BE* a miracle.
In either case, assuming that nature got where it was solely because of fixed laws, which operate today as they "always have", would lead to misleading conclusions.
The annoying part of this is, there is no way to PROVE either way which one of these is true.
So people often break along the theist/atheist boundary. :-)
Cheers!